(19)
(11) EP 0 338 561 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.07.1991 Bulletin 1991/27

(43) Date of publication A2:
25.10.1989 Bulletin 1989/43

(21) Application number: 89107139.1

(22) Date of filing: 20.04.1989
(51) International Patent Classification (IPC)4: G06F 11/22
(84) Designated Contracting States:
DE FR

(30) Priority: 20.04.1988 JP 95727/88

(71) Applicant: FUJITSU LIMITED
Kawasaki-shi, Kanagawa 211 (JP)

(72) Inventors:
  • Wakamoto, Masaaki
    Yokohama-shi Kanagawa 227 (JP)
  • Kim, Moo Wan
    Kawasaki-shi Kanagawa 214 (JP)
  • Fukazawa, Mitsunori
    Yokohama-shi Kanagawa 223 (JP)
  • Aramaki, Takahiro
    Kawasaki-shi Kanagawa 211 (JP)

(74) Representative: Lehn, Werner, Dipl.-Ing. et al
Hoffmann, Eitle & Partner, Patentanwälte, Postfach 81 04 20
81904 München
81904 München (DE)


(56) References cited: : 
   
       


    (54) Diagnostic expert system


    (57) A diagnostic expert system is set up with a first diagnostic subsystem (11,13) which is based on a maintenance technician's knowledge and a second diagnostic subsystem (12,14) which is based on a design engineer's knowledge. If a fault cannot be located under the first diagnostic subsystem (11,13), the second diagnostic subsystem (12,14), which operates by using of the result obtained from the first diagnostic subsystem (11,13) is started so as to determine the location of the fault.







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